This chapter is from the book

This chapter is from the book

TUESDAY: MARCH 7, 2006

THIS WEEK’S FOCUS: Choosing a Big-Screen TV

CRT PROJECTION

When you want a larger display for a bigger room (anything over 40 inches
diagonal), you need to step up from a traditional direct view set to a
rear-projection television (RPTV). RPTVs present a good value in terms of price
and performance and come in a variety of different display technologies.

The lowest-cost RPTVs are powered by three small (7- to 9-inch diagonal)
cathode ray tubes (CRTs). The process involves separating the video signal into
three separate colors—red, green, and blue—that are then fed to
three separate CRTs, one for each of those primary colors. The three CRTs are
aimed at a reflecting mirror, typically located toward the bottom of the set,
which reflects the picture onto the television’s screen. The separate red,
green, and blue pictures combine into the single full-color picture that you see
on the screen.

Compared to other types of rear projection sets, a CRT projector has a few
unique advantages. The chief advantage, of course, is the price: CRT projectors
typically cost $500 to $1,000 less than similar-sized DLP or LCD projectors.
Also attractive is the picture, which has a film-like quality not yet duplicated
by other technologies.

On the downside, CRT projectors are big and bulky, taking up a lot more floor
space than competing microdisplay projectors. CRT sets also output less light
than other types of RPTVs, and those three CRTs require careful (and constant)
convergence to keep the three colors aligned. Off-angle viewing is also somewhat
problematic; if you have a chair or two sitting off the side of the screen, this
might not be the right type of TV for you.

ON THIS DAY: CORNFLAKES FIRST SERVED (1897)

On this date in 1897, Dr. John Kellogg served the world’s first
cornflakes to his patients at a mental hospital in Battle Creek, Michigan. In
1906, Kellogg’s brother, Will Keith Kellogg, added sugar to the recipe and
began marketing cornflakes as a breakfast food.

GADGET OF THE WEEK: COUCH POTATO TORMENTOR

Here’s a gadget for the spouse of the ultimate home theater enthusiast.
The Couch Potato Tormentor is the "anti-remote," a small device that
interferes with your television viewing. It randomly changes the channel your
spouse is watching, which leads to all manner of hilarity (and possible spousal
conflict). Buy it for $14.95 at
http://www.couchpotatotormentor.com.